POWER TO SHED

NANOOOO · 13 May 2011

Ive constructed an oversized shed and now running in power.

I cant get access to the DB but can get access to the henley block, So was going to branch out of the henley block into a 60A Wylex Switch fuse and then from that to a new DB into my Shed.

Run 6mm SWA

The run is 40m

16 spot lights (LED 7WATT LIGHTS) (1.5mm radial)

6 sockets (2.5mm ring)

4 Dimplex duo 1.0kW / 1.95Kw radiators

Also considering installing a Sunbed but this is when i might have to up my cable from the switch fuse to the DB.

The sunbed company recommend a 16mm going to a rotary isolator from my DB on a 63a breaker.

Need help asap, About to the order cable

Thanks everyone

peterduckett · 13 May 2011

Stop! Do not pass go do not collect £200

<Insert Part P windge here>

You suggesting you may have a maximum demand of around 4-6 kw
over the length of 40m without the sun bed

Have you calculated the voltage drop over that distance bering in mind it has to be within 3% for a lighting circuit

I think your looking at a minimum of 10mm cable but who will sign this off

bernardgreen · 13 May 2011

STOP AND THINK and calculate

You might also consider fire extinguishers and first aid kit when you by the cable

4 Dimplex duo 1.0kW / 1.95Kw radiators (2.5 ring)

That's 7.8 Kw which at 230 volts will draw 33.9 Amps. What size MCB will you fit.

I hope this is a wind up and not a serious attempt at DIY.

NANOOOO · 13 May 2011

Infact its;

12 lights (LED 7WATT) 1.5mm (6amp)

6 Sockets - 2.5mm (32amp)

2 Dimplex 1.0kW / 1.95Kw radiators (What size cable would you recommend and what size breaker) but possibly 4

Thanks

bernardgreen · 13 May 2011

Do some calculations using this easy to use calculator.

http://www.tlc-direct.co.uk/Technical/Charts/VoltageDrop.html

And remember you may invalidate your house insurance policy if you continue this work without notifying the local council. You wont find that out until you make a claim and they refuse to pay quoting the clause about un-certified electrical work.

NANOOOO · 13 May 2011

I understand that but i merely just want to run in all the cables myself

Any help would be great.

peterduckett · 13 May 2011

Also work out your maximum demand please as 2 possible 4 heaters on will only give you a 6mm possibly 10mm possibly 16mm cable.

What else are you powering on those 6 sockets

peterduckett · 13 May 2011

NANOOOO said:
I understand that but i merely just want to run in all the cables myself

Any help would be great.

Im sure most sparks will let you do the donkey work of digging and laying the SWA as long as they can inspect it before you back fill

NANOOOO · 13 May 2011

Table light
Laptop
Radio

is what will be on the 6 sockets (3 doubles)

in regrds to the heaters, from the heaters themself they have a very small flex, wont it be a bugger to get 6mm into a spur unless i give them each there own radial.

thanks

NANOOOO · 13 May 2011

peterduckett said:
NANOOOO said:

I understand that but i merely just want to run in all the cables myself

Any help would be great.

Click to expand...

Im sure most sparks will let you do the donkey work of digging and laying the SWA as long as they can inspect it before you back fill

Hard to believe i was an electrician apprentice for 3.5years, passed all exams and AM2 (Not done anything for 5 years) aint got no books or remember how to work out calculations etc

bernardgreen · 13 May 2011

Voltage 230 Volts
Length 40 metres
Required Cable Size 10 mm
Voltage Drop 4.17 Volts.
Percentage Drop 1.8% >3% as lighting is involved
Current Load 26.0 Amps
Max Cable Load* 73.0 Amps

peterduckett · 13 May 2011

NANOOOO said:
Hard to believe i was an electrician apprentice for 3.5years, passed all exams and AM2

Yes it is very hard to belive

NANOOOO · 13 May 2011

Guys just had a word with the mrs and we now confirmed (NO BLINKING SUN BED)

3x DIMPLEX RADIATORS (Probably .075k) but would like to work calculation for the radiators @ 1.5k each (Each will be on there own radial)

12x spot lights (7watt led)

4x double sockets (radio/laptop/phone chargers/table light)

On my brief calculations all compliments to TLC - It says 6mm

bernardgreen · 13 May 2011

When calculating the CSA of the SWA remember that the voltage drop due to non lighting loads will affect the lighting so the maximum voltage drop is limited to that for lighting even though the majority of the load is non lighting.

holmslaw · 13 May 2011

diynot

If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

Select the supplier or trade you require, enter your location to begin your search.

Are you a trade or supplier? You can create your listing free at DIYnot Local

POWER TO SHED

holmslaw

Similar threads